Transfiguration is when the visiting spirits overlay their image on top of the subjects body features. A trance is not necessary for this phenomenon to occur & the subject can be fully conscious & unaware that spirit is working with them.
During the event of transfiguration, the spirit will move into the subjects body but not in the same aggressive manner that is requited for full or partial trance. They manipulate the etheric body & nervous system of the medium to form a mask of their own face using light & colours to effect their features. If you look close, it appears my head is covered with a type of helmet, but a small profile of someone’s face is manifesting over my face.